CN203405244U - Temperature and pressure compensation type high-temperature vortex precession flowmeter - Google Patents

Temperature and pressure compensation type high-temperature vortex precession flowmeter Download PDF

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Publication number
CN203405244U
CN203405244U CN201320496039.8U CN201320496039U CN203405244U CN 203405244 U CN203405244 U CN 203405244U CN 201320496039 U CN201320496039 U CN 201320496039U CN 203405244 U CN203405244 U CN 203405244U
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China
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temperature
tube
straight length
sensor
pressure
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CN201320496039.8U
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Chinese (zh)
Inventor
王国武
甘晓梅
张涵文
付苏涛
赵静
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HEFEI JINGDA INSTRUMENT CO Ltd
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HEFEI JINGDA INSTRUMENT CO Ltd
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Abstract

The utility model discloses a temperature and pressure compensation type high-temperature vortex precession flowmeter. The temperature and pressure compensation type high-temperature vortex precession flowmeter comprises a measurement tube body, a flow sensor is installed in a throat straight-tube section of the measurement tube body, a temperature sensor is installed in a rear straight-tube section of the measurement tube body, a vortex generator is installed in a necking section of the measurement tube body, a vortex digestion system is installed in the rear straight-tube section of the measurement tube body, a supporting barrel is arranged on the outer lateral portion of the throat straight-tube section and expansion section of the measurement tube body, a flow totalizer is fixed to the top of the supporting barrel, a pressure sensor is fixed to the upper portion of the supporting barrel, a pressure guiding opening is formed in the throat straight-tube section of the measurement tube body and connected with a pressure guiding condensing tube, a needle valve is arranged at the other end of the pressure guiding condensing tube and connected to the pressure sensor, and the flow sensor, the temperature sensor and the pressure sensor are all electrically connected with the flow totalizer. The flowmeter is compact in structure, high in reliability and measurement precision, good in high temperature resisting performance, low in manufacturing cost, convenient to use and maintain, long in service life and the like.

Description

Temperature and pressure compensation formula high temperature precession spiral flowmeter
technical field:
The utility model relates to vortex precession flowmeter field, particularly a kind of temperature and pressure compensation formula high temperature precession spiral flowmeter.
background technology:
High-temperature medium (steam) metering is a kind of main metering method of current energy measurement, the outer steam measurement instrument generally adopting of Present Domestic is orifice flowmeter and vortex shedding flow meter, orifice flowmeter measurement range is narrow, measuring accuracy is not high, flowmeter crushing is large, and can not measure temperature and pressure simultaneously, vortex shedding flow meter is mainly used in measuring steam, but it is high that the flow velocity of its convection cell requires, measurement range is not wide, and limitation measurement volumes flow, can not measure the mass rate of steam, two kinds of flowmeters require very high to front and back straight length, if need accurately to measure steam mass flow, not only to guarantee the front and back straight tube degree of growing, also need separately to join temperature transmitter, pressure unit and flow computer, be combined into a complicated measuring system, so cost is high, system complex.
utility model content:
The purpose of this utility model is can measure flow velocity, temperature and pressure and the steam mass flow of the fluids such as high-temperature steam and measuring accuracy is high, energy loss is little, installation requirement is low, the temperature and pressure compensation formula high temperature precession spiral flowmeter of more reliable performance in providing a kind of simultaneously.
The technical solution of the utility model:
Temperature and pressure compensation formula high temperature precession spiral flowmeter, include measuring tube body, it is characterized in that: described measuring tube body adopts the shape tube of similar Venturi tube structure, include front straight length, reducing section, throat's straight length, expansion segment and rear straight length, in throat's straight length of measuring tube body, flow sensor is installed, in rear straight length, temperature sensor is installed, reducing section place is provided with eddy generator, vortex digestion device is installed in rear straight length, throat's straight length of measuring tube body and the outside portion of expansion segment are provided with support tube, the top of support tube is fixed with flow integrator, support tube top is fixed with pressure transducer, throat's straight length place of measuring tube body is also provided with impulse mouth, the other end that impulse mouth place is connected to an impulse condenser pipe impulse condenser pipe is provided with needle valve, needle valve cut-in pressure sensor, flow, temperature, pressure transducer is all electrically connected to flow integrator.
Described temperature and pressure compensation formula high temperature precession spiral flowmeter, is characterized in that: minimum straight length caliber d=(0.7~the 0.85) * D of the reducing section of described measuring tube body, and D is inside nominal diameter, MEDIA FLOW is on the contrary with classical Venturi tube.
Described temperature and pressure compensation formula high temperature precession spiral flowmeter, is characterized in that: described flow sensor is arranged on rear 1/3 place of throat's straight length of measuring tube body.
Described temperature and pressure compensation formula high temperature precession spiral flowmeter, is characterized in that: described temperature sensor is arranged on rear 2/3 place of the rear straight length of measuring tube body.
Described temperature and pressure compensation formula high temperature precession spiral flowmeter, is characterized in that: described connecting pipe adopts a kind of condenser pipe mode, pressure tappings is arranged on throat's straight length place of measuring tube body.
Described temperature and pressure compensation formula high temperature precession spiral flowmeter, it is characterized in that: described vortex generator is that six pages of prismatic blades and generator core body form, 6 blades are left-handed to being welded on cylinder core body, different according to flowmeter caliber size, vane thickness is chosen within the scope of 1-3mm, and the swing angle of blade is that blade becomes between 30-40 degree with core body post center line.
Described temperature and pressure compensation formula high temperature precession spiral flowmeter, is characterized in that: described flow sensor has adopted the piezoelectric sensor of bimorph, and it is 1210 degree lithium niobate piezoelectric crystals that piezoelectric crystal is selected Curie temperature.
The utility model has the advantages that:
The utility model passes through flow sensor, temperature sensor and pressure transducer respectively by the flow velocity of the high-temperature mediums such as tested steam, signal corresponding to temperature and pressure value, then Jiang San road signal is sent to flow integrator, directly demonstrate flow, the temperature and pressure of steam, by the data of integrating instrument, calculate the various parameters such as density, flow velocity, mass rate of high temperature fluid simultaneously; Flowmeter structure of the present utility model is compact, the advantages such as reliability is high, measuring accuracy is high, resistance to elevated temperatures is good, low cost of manufacture, working service is convenient, life of product is long.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is side view of the present utility model.
Number in the figure: (1) eddy generator (2) measuring tube body (3) flow sensor (4) support tube (5) flow integrator (6) temperature sensor (7) whirlpool digestion device (8) pressure transducer (9) impulse condenser pipe (10) needle valve.
Embodiment
As Fig. 1, shown in 2, temperature and pressure compensation formula high temperature precession spiral flowmeter, include measuring tube body 2, measuring tube body 2 adopts the shape tube of similar Venturi tube structure, include front straight length, reducing section, throat's straight length, expansion segment and rear straight length, in throat's straight length of measuring tube body 2, flow sensor 3 is installed, temperature sensor 6 is installed in rear straight length, eddy generator 1 is installed in reducing section, vortex digestion device 7 is installed in rear straight length, throat's straight length of measuring tube body 2 and the outside portion of expansion segment are provided with support tube 4, the top of support tube 4 is fixed with flow integrator 5, support tube 4 tops are fixed with pressure transducer 8, throat's straight length place of measuring tube body 2 is also provided with impulse mouth, impulse mouth place is connected to impulse condenser pipe 9 impulse condenser pipe 9 other ends and is provided with needle valve 10, needle valve 10 cut-in pressure sensors 8, flow, temperature, pressure transducer 3, 6, 8 are all electrically connected to flow integrator 5.
Minimum straight length caliber d=(0.7~the 0.85) * D of the reducing section of measuring tube body 2, D is inside nominal diameter, MEDIA FLOW is on the contrary with classical Venturi tube.
Flow sensor 3 is arranged on rear 1/3 place of throat's straight length of measuring tube body 2.
Temperature sensor 6 is arranged on rear 2/3 place of the rear straight length of measuring tube body 2.
Impulse condenser pipe 9 adopts a gapless stainless steel tube that external diameter is 6-10mm.
Vortex generator 1 is that six pages of prismatic blades and generator core body form, 6 blades are left-handed to being welded on cylinder core body, different according to flowmeter caliber size, vane thickness is chosen within the scope of 1-3mm, and the swing angle of blade is that blade becomes between 30-40 degree with core body post center line.
Flow sensor 3 has adopted the piezoelectric sensor of bimorph, and it is 1210 degree lithium niobate piezoelectric crystals that piezoelectric crystal is selected Curie temperature.

Claims (7)

1. temperature and pressure compensation formula high temperature precession spiral flowmeter, include measuring tube body, it is characterized in that: described measuring tube body adopts the shape tube of similar Venturi tube structure, include front straight length, reducing section, throat's straight length, expansion segment and rear straight length, in throat's straight length of measuring tube body, flow sensor is installed, in rear straight length, temperature sensor is installed, in reducing section, eddy generator is installed, vortex digestion device is installed in rear straight length, throat's straight length of measuring tube body and the outside portion of expansion segment are provided with support tube, the top of support tube is fixed with flow integrator, support tube top is fixed with pressure transducer, the outside portion of throat's straight length of measuring tube body is also provided with impulse mouth, impulse mouth place is connected to an impulse condenser pipe, the other end of impulse condenser pipe is provided with needle valve, needle valve cut-in pressure sensor, flow, temperature, pressure transducer is all electrically connected to flow integrator.
2. temperature and pressure compensation formula high temperature precession spiral flowmeter according to claim 1, it is characterized in that: minimum straight length caliber d=(0.7~the 0.85) * D of the reducing section of described measuring tube body, D is inside nominal diameter, and MEDIA FLOW is on the contrary with classical Venturi tube.
3. temperature and pressure compensation formula high temperature precession spiral flowmeter according to claim 1, is characterized in that: described flow sensor is arranged on rear 1/3 place of throat's straight length of measuring tube body.
4. temperature and pressure compensation formula high temperature precession spiral flowmeter according to claim 1, is characterized in that: described temperature sensor is arranged on rear 2/3 place of the rear straight length of measuring tube body.
5. temperature and pressure compensation formula high temperature precession spiral flowmeter according to claim 1, is characterized in that: described impulse mouth is located at throat's straight tube degree place; Pressure guiding pipe adopts a kind of gapless stainless steel tube of condenser pipe mode.
6. temperature and pressure compensation formula high temperature precession spiral flowmeter according to claim 1, it is characterized in that: described vortex generator is that six pages of prismatic blades and generator core body form, 6 blades are left-handed to being welded on cylinder core body, different according to flowmeter caliber size, vane thickness is chosen within the scope of 1-3mm, and the swing angle of blade is that blade becomes between 30-40 degree with core body post center line.
7. temperature and pressure compensation formula high temperature precession spiral flowmeter according to claim 1, is characterized in that: described flow sensor has adopted the piezoelectric sensor of bimorph, and it is 1210 degree lithium niobate piezoelectric crystals that piezoelectric crystal is selected Curie temperature.
CN201320496039.8U 2013-08-14 2013-08-14 Temperature and pressure compensation type high-temperature vortex precession flowmeter Active CN203405244U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320496039.8U CN203405244U (en) 2013-08-14 2013-08-14 Temperature and pressure compensation type high-temperature vortex precession flowmeter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320496039.8U CN203405244U (en) 2013-08-14 2013-08-14 Temperature and pressure compensation type high-temperature vortex precession flowmeter

Publications (1)

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CN203405244U true CN203405244U (en) 2014-01-22

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103438948A (en) * 2013-08-14 2013-12-11 合肥精大仪表股份有限公司 Temperature and pressure compensation type high-temperature precession vortex flowmeter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103438948A (en) * 2013-08-14 2013-12-11 合肥精大仪表股份有限公司 Temperature and pressure compensation type high-temperature precession vortex flowmeter

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